Google Earth has a mechanism for presenting tiled data that is very similar to the above process. For the full technical details see this page. This is then divided into four squares, each of which is divided into four squares and so on. It is a relatively simple system that involves using the Mercator map projection and cutting off above 85.0511°N and below 85.0511°S, resulting in a map of the globe that is square. Most modern online maps use a fairly standardised method of tiling the map imagery. Also provided is the option to view the imagery as tiled data. However, the total size of all the imagery is over 24 GB. The NOAA has made the imagery available for viewing on this map and also offers the option to download it. We wondered what it would take to get the imagery into Google Earth. Yesterday we had a look at some aerial imagery of the eastern coast of the US after Hurricane Matthew.
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